diff options
-rw-r--r-- | firmware/drivers/lcd-ipodvideo.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/firmware/drivers/lcd-ipodvideo.c b/firmware/drivers/lcd-ipodvideo.c index 84b830377e..b94ab0b992 100644 --- a/firmware/drivers/lcd-ipodvideo.c +++ b/firmware/drivers/lcd-ipodvideo.c | |||
@@ -172,12 +172,19 @@ void lcd_update_rect(int x, int y, int width, int height) | |||
172 | unsigned short *end = &src[LCD_WIDTH * height]; | 172 | unsigned short *end = &src[LCD_WIDTH * height]; |
173 | int line_rem = (LCD_WIDTH - width); | 173 | int line_rem = (LCD_WIDTH - width); |
174 | while (src < end) { | 174 | while (src < end) { |
175 | /* for each column */ | 175 | /* Duff's Device to unroll loop */ |
176 | unsigned short *end_line = src + width; | 176 | register int count = width ; |
177 | while (src < end_line) { | 177 | register int n=( count + 7 ) / 8; |
178 | /* write out two pixels */ | 178 | switch( count % 8 ) { |
179 | outw(*(src++), 0x30000000); | 179 | case 0: do{ outw(*(src++), 0x30000000); |
180 | outw(*(src++), 0x30000000); | 180 | case 7: outw(*(src++), 0x30000000); |
181 | case 6: outw(*(src++), 0x30000000); | ||
182 | case 5: outw(*(src++), 0x30000000); | ||
183 | case 4: outw(*(src++), 0x30000000); | ||
184 | case 3: outw(*(src++), 0x30000000); | ||
185 | case 2: outw(*(src++), 0x30000000); | ||
186 | case 1: outw(*(src++), 0x30000000); | ||
187 | } while(--n>0); | ||
181 | } | 188 | } |
182 | src += line_rem; | 189 | src += line_rem; |
183 | } | 190 | } |